XECOM XEISDNU Datasheet

XEISDNU Page 1 of 10

XEISDNU

Single Module ISDN Terminal Adapter

With Integrated NT1 Interface

Description

The XEISDNU integrated ISDN Terminal
Adapter is a unique component level solution for
high speed, stand-alone and embedded equip­ment applications needing access to ISDN ser­vice. The module can directly connect to a host
computer through its on-board EIA-232E interface
and link to the ISDN subscriber line U interface
with its integrated NT1.

The device is designed for the ISDN Basic
Rate Interface (BRI) which consists of two bearer
(B) channels for data or voice and one delta (D)
channel for signaling. The module provides two
64k bps channels between the host computer and
the ISDN service. One is available as a data
channel and the other can be made available for
analog phone/fax/modem calls with the addition
of the XEISDNP Analog Telephone (POTS)
Equipment Interface. Together these provide the
user with a complete ISDN terminal adapter
function in two compact modules.

Built-in ISDN control firmware supports all the
functions necessary for setup and configuration of
the terminal adapter and the ISDN line. Configur­ation can be accomplished via an extended AT
command set, a menu-driven setup utility, or
factory default/user stored configuration profiles.

The built-in ISDN Monitor firmware has fifteen
commands supporting customer program
development and download. The 256K x 16
Flash Memory is designed to support custom
control program downloading. By changing a
configuration pin, the XEISDNU can boot-up from
the ISDN Monitor or a user developed program
as well as the built-in ISDN control program.

Features

• Small size: 2.75" x 1.38" x 0.42"

• On-board Motorola MC68302 Integrated Multi­protocol Processor with RISC controller for
high speed operations; also included on-board:
128K x 16 SRAM, 256K x 16 Flash Memory
and 8K x 8 EEPROM

• ISDN line U interface (integrated NT1) with
2B1Q encoding (ANSI T1.601) for North
American usage. V.120 data rate adaptation
protocol and point to point protocol (PPP)

• ISDN control program allows connection with
AT&T 5ESS, Northern Telecom DMS 100 and
National ISDN-1 central office switches

• Standard EIA-232E, ITU V.24 serial interface,
300 to 115,200 bps asynchronous and 1200 to
64,000 bps synchronous data rate

• Menu-driven and stored configurations

• Control signal outputs to interface with
XEISDNP Analog Telephone (POTS) Equip­ment Interface module

• On-board ISDN Monitor supports user
program downloading and system debugging

• Jumper configurable memory addressing
allows change from Development mode (using
ISDN Monitor) to Application mode (using
either a built-in ISDN control program or a user
developed program)

• ISP (In System Programmable) Flash Memory
capability for future function up-grading

Page 2 of 10 XEISDNU

XEISDNU Block Diagram

Mechanical Specifications

INCHES METRIC (MM)

MIN MAX MIN MAX

A

2.740 2.760 69.60 70.10

B

1.370 1.390 34.80 35.31

C

0.420 0.430 10.67 10.92

D

1.190 1.210 30.23 30.73

E

2.290 2.310 58.17 58.67

F

0.125 0.200 3.18 5.08

G

0.080 0.100 2.03 2.54

H

0.215 0.235 5.46 5.97

J

0.090 0.110 2.29 2.79

K

0.020 0.025 0.51 0.64

(Total pin count is 24 per side view.)

U

Interface

ISDN
Local

Loop

68000

Core

DMA

(1)

Timers

(3)

512KB

Flash

Memory

256KB
SRAM

RISC

Controller

DMA

(6)

1152 Byte

Dual Port

RAM

8KB

EEPROM

SMCs (2)

and

SCP

SCCs

(3)

RS-232C

Drivers

I/O Ports

POTS Data RS-232 POTS Control

XEISDNU Page 3 of 10

Pin Configuration

Pin Descriptions

Pin Name Pin # Direction Description

TIN1 1 ISDN U transformer Primary side (see schematic)
TIN2 2 ISDN U transformer primary side (see schematic)

No Pin 3 N/A No pin
TOUT1 4 ISDN U transformer secondary side (see schematic)
TOUT2 5 ISDN U transformer secondary side (see schematic)

Reserved 6 N/A No user connection allowed
Reserved 7 N/A No user connection allowed
Reserved 8 N/A No user connection allowed

GND 9 Ground Power & signal ground

TIN1
TIN2

TOUT1

TOUT2
Reserved
Reserved
Reserved

GND

CFG/SDO

TD

RD

RTS

CTS

DSR

CD
TCLK
RCLK

DTR

RI

MCLK

RST BT

-12V

GND

+5V
DCL
D OUT
DIN
FSX
Reserved
Reserved
Reserved
Reserved
FSR
isp EN
SCLK
OH/MODE
DTMF_RDY/SDI
RING EN
DC EN
PWR CTRL
RT CTRL
PDI
D4
D5
D6
D7
+12V

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24

48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25